PSN-L Email List Message

Subject: unusual Jan 12 quake near Bermuda?
From: "David Saum" DSaum@............
Date: Mon, 14 Jan 2002 14:16:28 -0500

While testing a 4.5 Hz geophone system near
Washington, DC on January 12,  I seem
to have picked up a good signal from a
quake near Bermuda (about 800 miles away)

Here is the WinQuake data file and plot

Note that my time base was fast by about 290 seconds.

Here is a WinQuake map that incorporates
my data and PSN data from sites in NJ and

A couple of questions:

1. Is it unusual for a signal from a quake 800 miles
away to have so much high frequency energy?

2. Am I setting up the S and P markers correctly?
My quake location seems a lot further off than
the PSN data sets from NY and AL.  I am a
WinQuake novice.

I have put up a new web page on my simplified
electronics board for a short period system:

....Dave Saum


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